Somebody recently claimed (https://www.datalounge.com/thread/35833144-designing-women-has-been-remastered-in-high-definition-widescreen-on-hulu) online that Alice Ghostley supposedly went up on her lines a lot and required retakes/pickups. This is based on an account by a screenwriting student at the time whose professor hooked him up with tickets to the tapings. So he saw much of Season 6 being done.